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State Partl. Name

Level Legend: - - - - - - - - - Below Recommended Low Runnable - - - - - - - - High Runnable Above Recommended - - - - - - - - - Unknown Unknown
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River Name/Section Class Level running? Updated
Anacostia, Northwest Branch [MD] US Rte 29 to Riggs Road I-III(V+) 7 cfs
0 cfs/hr
L0-
Below Recom.
02h03m
Antietam Creek [MD] 1) Upper: Oak Bridge to Hwy.68 I-II 2.65 ft
-0.01 ft/hr
L8-
Below Recom.
01h31m
Antietam Creek [MD] 2) Hwy 68 to Hwy 34 I-II 2.65 ft
-0.01 ft/hr
R1-
Lower Runnable
01h31m
Antietam Creek [MD] 3) Hwy.34 to Potomac River I-II 2.65 ft
-0.01 ft/hr
R1-
Lower Runnable
01h31m
Bear Creek [MD] U.S. 219 to Youghiogheny River at Friendsville IV 19 cfs
0 cfs/hr
L0-
Below Recom.
01h16m
Beaver Creek [MD] Beaver Creek Park N Ride (I-70) to Alternate Rt. 40 I(II) 2.65 ft
-0.01 ft/hr
L6-
Below Recom.
01h31m
Bennett Creek [MD] MD Route 355 to Monocacy River I-II 21 cfs
0 cfs/hr
L9-
Below Recom.
02h03m
Big Elk Creek [MD] PA Route 341 to Elkton I-II 42 cfs
0 cfs/hr
L9-
Below Recom.
02h03m
Broad Creek [MD] MD Route 136 to MD Route 623 I-II 109 cfs
0 cfs/hr
L2-
Below Recom.
01h31m
Cabin John Creek [MD] River Road to Potomac II-III 29 cfs
0 cfs/hr
L7-
Below Recom.
01h31m
Casselman, N. Branch [MD] Dung Hill Road to Maryland Route 495 I-III+ 0.98 ft
0.00 ft/hr
L1-
Below Recom.
01h16m
Casselman [MD] MD Route 495 to Salisbury, Pennsylvania I-II 26 cfs
0 cfs/hr
L9-
Below Recom.
01h16m
Catoctin Creek [MD] US 40 to Potomac River I-II 1.80 ft
+0.01 ft/hr
L8-
Below Recom.
02h03m
Conowingo Creek [MD] Oakwood to Susquehanna River IV-V 283 cfs
-8 cfs/hr
L7-
Below Recom.
01h01m
Crabtree Creek [MD] Swanton, MD to Savage Reservoir III-IV+ 17 cfs
0 cfs/hr
L2-
Below Recom.
01h31m
Deep Creek [MD] Dam to Youghiogheny River V n/a

Deer Creek [MD] 1. Bond Road to Eden Mill Lake Boat Ramp I 2.47 ft
0.00 ft/hr
L4-
Below Recom.
01h31m
Deer Creek [MD] 2. Eden Mill Dam to Sandy Hook Rd./Deer Creek Conservation A... I-III 2.47 ft
0.00 ft/hr
L8-
Below Recom.
01h31m
Deer Creek [MD] 3. Sandy Hook Rd./Deer Creek Conservation Area River Access ... I-II 2.47 ft
0.00 ft/hr
L8-
Below Recom.
01h31m
Deer Creek [MD] 4. MD 136 to Susquehanna River I 2.47 ft
0.00 ft/hr
L8-
Below Recom.
01h31m
Evitts Creek [MD] Lake Gordon Dam (PA) to Maryland Route 51(MD) I-III 2.08 ft
0.00 ft/hr
L5-
Below Recom.
01h16m
Fifteen Mile Creek [MD] US Route 40 to Potomac River I-II(III) 0.87 ft
0.00 ft/hr
L6-
Below Recom.
01h46m
Flintstone Creek [MD] Flintstone Creek Road to Town Creek I-III 35 cfs
0 cfs/hr
L8-
Below Recom.
01h16m
Georges Creek [MD] Maryland Rte. 36 (Midland) to N. Branch Potomac River III-IV 3.14 ft
-0.01 ft/hr
L5-
Below Recom.
02h03m
Gunpowder Falls [MD] 1 - Graves Run Rd to Prettyboy Reservoir (Gunpowder Road) II+ 7 cfs
0 cfs/hr
L9-
Below Recom.
01h16m
Gunpowder Falls [MD] 2 - Prettyboy Dam to Falls Road I-III 65 cfs
0 cfs/hr
L0-
Below Recom.
01h46m
Gunpowder Falls [MD] 3 - Falls Road to Phoenix I-II 65 cfs
0 cfs/hr
L0-
Below Recom.
01h46m
Gunpowder Falls [MD] 4 - Lower Loch Raven Dam to Route 1 I n/a

Gunpowder Falls [MD] 5 - Route 1 to U.S.40 II-III n/a

Gwynns Falls [MD] 1) Villa Nova to Woodlawn II 35 cfs
-3 cfs/hr
L9-
Below Recom.
01h16m
Gwynns Falls [MD] 2) Gwynn Oak Ave. to Wilkens Ave (US 1) II-III(IV) 35 cfs
-3 cfs/hr
L6-
Below Recom.
01h16m
Herring Run [MD] Echodale Ave to US 40 II-III 1 cfs
-0 cfs/hr
L9-
Below Recom.
01h24m
Hunting Creek [MD] Catoctin Hollow Road to Frank Bentz Lake III-IV+(V) 28 cfs
+ 1 cfs/hr
L7-
Below Recom.
02h03m
Jennings Run [MD] Barrelville to Wills Creek III+ 56 cfs
0 cfs/hr
L6-
Below Recom.
00h31m
Jones Falls [MD] Lake Roland to Round Falls I-III n/a

Laurel Run [MD] Laurel Run IV 2.37 ft
0.00 ft/hr
L0-
Below Recom.
01h31m
Little Falls [MD] Parkton (Maryland Route 45) to Gunpowder Falls I-III 49 cfs
-2 cfs/hr
L9-
Below Recom.
01h31m
Little Gunpowder Falls [MD] Jerusalem Mill (Jerusalem Rd.) to U.S. Route 40 II-III 38 cfs
-1 cfs/hr
L5-
Below Recom.
01h31m
Little Patuxent [MD] US Route 29 (Columbia) to US Route 1 I-IV 77 cfs
-1 cfs/hr
L2-
Below Recom.
01h31m
Little Seneca Creek [MD] Boyds to Darnestown II(III) 77 cfs
+ 2 cfs/hr
L8-
Below Recom.
01h56m
Long Green Creek [MD] Glen Arm Rd. to Gunpowder Falls IV 9 cfs
-0 cfs/hr
L7-
Below Recom.
01h31m
Middle Creek (Toms Creek trib.) [MD] T318 to Harney Road II+ 50 cfs
-1 cfs/hr
L8-
Below Recom.
01h16m
Middle Patuxent [MD] Carroll Mill Road to Savage Mill I-II(IV) 3.52 ft
-0.01 ft/hr
L2-
Below Recom.
01h31m
Middle creek [MD] Wolfsville to Myersville II-III(V) 1.80 ft
+0.01 ft/hr
L6-
Below Recom.
02h03m
Mill Run [MD] Pigs Ear Road to Yough River Lake III-IV+ 9 cfs
0 cfs/hr
L0-
Below Recom.
01h31m
Muddy Creek [MD] Cranesville Swamp Nature Preserve (Lake Ford Road) to Youghi... I-III(V) 9 cfs
0 cfs/hr
L0-
Below Recom.
01h31m
Northeast Creek [MD] below covered bridge on Route 272 V 42 cfs
0 cfs/hr
L8-
Below Recom.
02h03m
Octoraro Creek [MD] New Bridge Road to Richardsmere II 283 cfs
-8 cfs/hr
L5-
Below Recom.
01h01m
Olmsted Island Creek [MD] Clara Barton Parkway to C&O Canal V n/a

Owens Creek [MD] 1) Lantz to Roddy Covered Bridge II-IV 28 cfs
+ 1 cfs/hr
L7-
Below Recom.
02h03m
Owens Creek [MD] 2) Rocky Ridge Road (Hwy.77) to Monocacy River I-II 28 cfs
+ 1 cfs/hr
L9-
Below Recom.
02h03m
Patapsco, S. Branch [MD] 1. Woodbine to Henryton Rd. II+(III) ~ 93 cfs
+ 105 cfs/hr
L0-
Below Recom.
01h48m
Patapsco, S. Branch [MD] 2. Marriottsville Rd to Woodstock I-III(IV) 66 cfs
-2 cfs/hr
L0-
Below Recom.
01h31m
Patapsco [MD] Woodstock to Elkridge I-III 66 cfs
-2 cfs/hr
L0-
Below Recom.
01h31m
Piney Run [MD] Arrington Road to Marriottsville I-III(IV) 7 cfs
+ 0 cfs/hr
L1-
Below Recom.
01h46m
Potomac, North Branch [MD] 1. Henry, WV to Gormania, WV I-III 2.37 ft
0.00 ft/hr
L0-
Below Recom.
01h31m
Potomac, North Branch [MD] 2. Gormania, WV to Kitzmiller, MD III-IV 2.37 ft
0.00 ft/hr
L4-
Below Recom.
01h31m
Potomac, North Branch [MD] 3. Kitzmiller, MD to Jennings Randolph Lake II-III 2.37 ft
0.00 ft/hr
L5-
Below Recom.
01h31m
Potomac, North Branch [MD] 4. Barnum, WV to Bloomington, MD II(III) 274 cfs
0 cfs/hr
L5-
Below Recom.
01h31m
Potomac, North Branch [MD] 5. Bloomington, MD to Keyser, WV I-II 420 cfs
0 cfs/hr
R0-
Lower Runnable
01h46m
Potomac, North Branch [MD] 6. Black Oak River Access Nr. McCoole, MD to Pinto, MD I 420 cfs
0 cfs/hr
R4-
Runnable
01h46m
Potomac, North Branch [MD] 7. Pinto, MD to Upper Potomac Industrial Park (upstream of C... I 420 cfs
0 cfs/hr
R4-
Runnable
01h46m
Potomac [MD] 0HF-1. Dargans Bend Boat Ramp to Sandy Hook/Potoma Wayside II 3.43 ft
-0.01 ft/hr
R4-
Runnable
01h31m
Potomac [MD] 0HF-2. Sandy Hook/Potoma Wayside to Point of Rocks I-II 3.43 ft
-0.01 ft/hr
R4-
Runnable
01h31m
Potomac [MD] 1. Mouth of Monocacy to Riley's Lock Boat Ramp I 3.26 ft
-0.01 ft/hr
R4-
Runnable
02h03m
Potomac [MD] 2. Violette's Lock/GW Canal Loop I-II 3.26 ft
-0.01 ft/hr
R4-
Runnable
02h03m
Potomac [MD] 3. Great Falls (Center Lines) V+ 3.26 ft
-0.01 ft/hr
R0-
Lower Runnable
02h03m
Potomac [MD] 3. Great Falls (Fish Ladder) IV-V(V+) 3.26 ft
-0.01 ft/hr
L8-
Below Recom.
02h03m
Potomac [MD] 3. Great Falls (MD Lines) V+ 3.26 ft
-0.01 ft/hr
R7-
Upper Runnable
02h03m
Potomac [MD] 3. Great Falls (VA Lines) V 3.26 ft
-0.01 ft/hr
R4-
Runnable
02h03m
Potomac [MD] 4. Mather Gorge to Lock 10 I-IV 3.26 ft
-0.01 ft/hr
R1-
Lower Runnable
02h03m
Potomac [MD] 5. Lock 10 to Little Falls I 3.26 ft
-0.01 ft/hr
R1-
Lower Runnable
02h03m
Potomac [MD] 6. Little Falls II-III(IV) 3.26 ft
-0.01 ft/hr
R0-
Lower Runnable
02h03m
Rock Creek [MD] 1. Rockville to Military Road I(II) 29 cfs
0 cfs/hr
L8-
Below Recom.
01h31m
Rock Creek [MD] 2. Military Road to Potomac River in D.C. I-III 29 cfs
0 cfs/hr
L7-
Below Recom.
01h31m
Savage [MD] Avilton Lonaconing Road to Head of Savage Reservoir II(IV) 17 cfs
0 cfs/hr
L7-
Below Recom.
01h31m
Savage [MD] Dam to North Branch Potomac River III-IV 103 cfs
0 cfs/hr
L0-
Below Recom.
01h31m
Seneca Creek [MD] Black Rock Mill to Riley's Lock Boat Ramp I-II 77 cfs
+ 2 cfs/hr
L8-
Below Recom.
01h56m
Sideling Hill Creek [MD] Purcell Penn.(sr 2011)to the Potomac river I-II 0.87 ft
0.00 ft/hr
L0-
Below Recom.
01h46m
Town Creek [MD] I-68 to Potomac River I 35 cfs
0 cfs/hr
L9-
Below Recom.
01h16m
Wills Creek [MD] Ellerslie to Eckhart Junction I-II 56 cfs
0 cfs/hr
L9-
Below Recom.
00h31m
Winters Run [MD] Pleasantville Road to Maryland Route 7 I-II 38 cfs
-1 cfs/hr
L6-
Below Recom.
01h31m
Youghiogheny [MD] 0. US Route 50 to Millers Run I-II 9 cfs
0 cfs/hr
L0-
Below Recom.
01h31m
Youghiogheny [MD] 1. Tippy-Top IV 79 cfs
0 cfs/hr
L8-
Below Recom.
01h31m
Youghiogheny [MD] 2. Top IV-V 79 cfs
0 cfs/hr
L8-
Below Recom.
01h31m
Youghiogheny [MD] 3. Upper IV-V 2.49 ft
0.00 ft/hr
L0-
Below Recom.
02h03m
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